EGR System Function Test

(1) Disconnect the green striped vacuum hose from the EGR valve, and using a three-way terminal, connect a hand vacuum pump as shown.
(2) Regarding cold condition [coolant temperature: 20°C (68°F) or less) and warm condition [coolant temperature: 70°C (158°F) or more] of the engine, check the following two points.

















(3) Disconnect the three-way terminal, and connect the hand vacuum pump to the EGR valve.
(4) When a negative pressure of 31 kPa (9.1 in.Hg) is applied during idling, check that the engine stops or idles unstably.